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1: <html> 2: <head> 3: <title>pcresample specification</title> 4: </head> 5: <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> 6: <h1>pcresample man page</h1> 7:  8: Return to the <a href="index.html">PCRE index page</a>. 9:  10:  11: This page is part of the PCRE HTML documentation. It was generated automatically 12: from the original man page. If there is any nonsense in it, please consult the 13: man page, in case the conversion went wrong. 14:   15:   16: PCRE SAMPLE PROGRAM 17:   18:  19: A simple, complete demonstration program, to get you started with using PCRE, 20: is supplied in the file pcredemo.c in the PCRE distribution. A listing of 21: this program is given in the 22: <a href="pcredemo.html">pcredemo</a> 23: documentation. If you do not have a copy of the PCRE distribution, you can save 24: this listing to re-create pcredemo.c. 25:  26:  27: The demonstration program, which uses the original PCRE 8-bit library, compiles 28: the regular expression that is its first argument, and matches it against the 29: subject string in its second argument. No PCRE options are set, and default 30: character tables are used. If matching succeeds, the program outputs the 31: portion of the subject that matched, together with the contents of any captured 32: substrings. 33:  34:  35: If the -g option is given on the command line, the program then goes on to 36: check for further matches of the same regular expression in the same subject 37: string. The logic is a little bit tricky because of the possibility of matching 38: an empty string. Comments in the code explain what is going on. 39:  40:  41: If PCRE is installed in the standard include and library directories for your 42: operating system, you should be able to compile the demonstration program using 43: this command: 44: <pre> 45: gcc -o pcredemo pcredemo.c -lpcre 46: </pre> 47: If PCRE is installed elsewhere, you may need to add additional options to the 48: command line. For example, on a Unix-like system that has PCRE installed in 49: /usr/local, you can compile the demonstration program using a command 50: like this: 51: <pre> 52: gcc -o pcredemo -I/usr/local/include pcredemo.c -L/usr/local/lib -lpcre 53: </pre> 54: In a Windows environment, if you want to statically link the program against a 55: non-dll pcre.a file, you must uncomment the line that defines PCRE_STATIC 56: before including pcre.h, because otherwise the pcre_malloc() and 57: pcre_free() exported functions will be declared 58: __declspec(dllimport), with unwanted results. 59:  60:  61: Once you have compiled and linked the demonstration program, you can run simple 62: tests like this: 63: <pre> 64: ./pcredemo 'cat|dog' 'the cat sat on the mat' 65: ./pcredemo -g 'cat|dog' 'the dog sat on the cat' 66: </pre> 67: Note that there is a much more comprehensive test program, called 68: <a href="pcretest.html">pcretest,</a> 69: which supports many more facilities for testing regular expressions and both 70: PCRE libraries. The 71: <a href="pcredemo.html">pcredemo</a> 72: program is provided as a simple coding example. 73:  74:  75: If you try to run 76: <a href="pcredemo.html">pcredemo</a> 77: when PCRE is not installed in the standard library directory, you may get an 78: error like this on some operating systems (e.g. Solaris): 79: <pre> 80: ld.so.1: a.out: fatal: libpcre.so.0: open failed: No such file or directory 81: </pre> 82: This is caused by the way shared library support works on those systems. You 83: need to add 84: <pre> 85: -R/usr/local/lib 86: </pre> 87: (for example) to the compile command to get round this problem. 88:  89:   90: AUTHOR 91:   92:  93: Philip Hazel 94:   95: University Computing Service 96:   97: Cambridge CB2 3QH, England. 98:   99:  100:   101: REVISION 102:   103:  104: Last updated: 10 January 2012 105:   106: Copyright © 1997-2012 University of Cambridge. 107:   108:  109: Return to the <a href="index.html">PCRE index page</a>. 110: 